4. Fluid reaction surfaces (i.e., impellers)
  5. Specific blade structure
  6. Laminated, embedded member or encased material

David A. Popelka

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Coupled aircraft rotor system

Aeronautics and astronautics – Aircraft – heavier-than-air – Helicopter or auto-rotating wing sustained – i.e. – gyroplanes
Reexamination Certificate

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Fixed leading edge slat spoiler for a horizontal stabilizer

Aeronautics and astronautics – Aircraft sustentation – Sustaining airfoils
Patent

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Nodalized rotor

Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Laminated – embedded member or encased material
Patent

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Soft in-plane tiltrotor hub

Fluid reaction surfaces (i.e. – impellers) – Articulated – resiliently mounted or self-shifting impeller... – Nonmetallic resilient mounting
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1056031

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